2026 · Midsize Car · Gas
2026 Kia K4 MPG & fuel economy
The 2026 Kia K4 is a midsize car offered in 3 EPA-rated configurations. The most efficient version returns 33 MPG combined (29 city / 39 highway) on regular gasoline. Across the lineup, combined ratings range from 28 to 33 MPG. That's down 1 MPG from the 2025 model. Among 31 midsize cars rated for 2026, it ranks 13th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $1,409 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2026 Kia K4's fuel average is 14.0 km/L (7.1 L/100 km), or 33 MPG combined: 12.3 km/L in the city and 16.6 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 29 | 12.3 | 8.1 |
| Highway | 39 | 16.6 | 6.0 |
| Combined | 33 | 14.0 | 7.1 |
How it ranks among 2026 Midsize Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
K4 MPG across model years
Full history →3 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| FWD · 2.0L 4-cyl · CVT K4 4DR w/ DMS |
Gas | 29 MPG | 39 MPG | 33 MPG | — | $1,409 |
| FWD · 2.0L 4-cyl · CVT K4 Hatchback |
Gas | 28 MPG | 34 MPG | 30 MPG | — | $1,550 |
| FWD · 1.6L 4-cyl turbo · 8-speed automatic K4 |
Gas | 26 MPG | 33 MPG | 28 MPG | — | $1,661 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 2.0L 4-cyl
- Transmission
- CVT
- Drivetrain
- FWD
- Passenger volume
- 99 cu ft
- Cargo volume
- 15 cu ft
- Tailpipe CO₂
- 269 g/mi
- EPA fuel economy score
- 6/10
- EPA greenhouse gas score
- 6/10
2026 Kia K4 vs. rivals
Compare the 2026 K4
With any other car from any year, including other K4 model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 2026 Kia K4?
Up to 33 MPG combined (29 city / 39 highway); ratings range from 28 to 33 MPG depending on configuration.
What fuel does the 2026 Kia K4 use?
Regular gasoline.
What is the fuel average in km/L for the 2026 Kia K4?
The 2026 Kia K4's fuel average is 14.0 km/L (7.1 L/100 km), or 33 MPG combined: 12.3 km/L in the city and 16.6 km/L on the highway.
How much does it cost to fuel the 2026 Kia K4 per year?
About $1,409 at 15,000 miles a year with $3.10/gal regular gas, or $9.39 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.